<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        
        <!-- 卡片 -->
        <el-card class="box-card">
            <el-button type="primary" @click="AddRoleDialogVisible = true">添加角色</el-button> 
            <!-- 权限列表 -->
            <!-- 用户列表 -->
             <el-table :data="rolesList" border stripe style="width:100%">
                <el-table-column type="expand">
                     <template slot-scope="scope">
                        <el-form label-position="left" inline class="demo-table-expand">
                            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                                v-for="(item1, i1) in scope.row.children" :key="item1.id">
                                    <!-- 一级权限 -->
                                    <el-col :span="5">
                                        <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 二级和三级 -->
                                    <el-col :span="19">
                                        <!-- 通过for循环 渲染二级权限 -->
                                        <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" >
                                        <el-col :span="6">
                                            <el-tag type="success"
                                            closable @close="removeRightById(scope.row, item2.id)"
                                            >{{ item2.authName }}</el-tag>
                                            <i class="el-icon-caret-right"></i>
                                        </el-col>
                                        <el-col :span="18">
                                            <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)"
                                            >{{ item3.authName}}</el-tag>
                                        </el-col>
                                        </el-row>
                                    </el-col>
                            </el-row>
                        </el-form>
                     </template>
                </el-table-column>

                <el-table-column align="center" type="index" label="#" ></el-table-column>
                <el-table-column prop="roleName" label="角色名称" width=""></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述" width=""></el-table-column>
                <el-table-column prop="" label="操作" width="">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)"
                        >分配权限</el-button>
                    </template>
                </el-table-column>
             </el-table>
        </el-card>

        <!-- 添加角色 -->
        <el-dialog
            title="添加用户" @close="AddRoleDialogclose" :visible.sync="AddRoleDialogVisible" width="50%">
            <!-- 主题内容 -->
            <el-form :model="addRole" :rules="addRoleRules" ref="addRoleFormRef" label-width="90px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRole.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRole.roleDesc"></el-input>
                </el-form-item>
            </el-form>

            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="AddRoleDialogclose">取 消</el-button>
                <el-button type="primary" @click="adduser">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑角色 -->
        <el-dialog
            title="编辑角色" @close="rolesRoleDialogclose" :visible.sync="rolesRoleDialogVisible" width="50%">
            <!-- 主题内容 -->
            <el-form :model="rolesRole" :rules="rolesRoleRules" ref="rolesRoleFormRef" label-width="90px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="rolesRole.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="rolesRole.roleDesc"></el-input>
                </el-form-item>
            </el-form>

            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="rolesRoleDialogclose">取 消</el-button>
                <el-button type="primary" @click="rolesuser">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <el-tree
            :data="rightsList"
            :props="treeProps"
            ref="treeRef"
            show-checkbox
            node-key="id"
            default-expand-all
            :default-checked-keys="defKeys"
            >
        </el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogClosed">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
        </el-dialog>

    </div>      
</template>
<script>
export default {
    data() {
        return {
            //列表数据
            rolesList:[],
            //添加角色框
            AddRoleDialogVisible:false,
            //编辑角色
            rolesRoleDialogVisible:false,
            //分配权限
            setRightDialogVisible:false,
            rightsList:[],
            //  树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            //   默认选中节点ID值
            defKeys: [],
            roleId:0,
            //添加角色
            addRole:{
                roleName:'',
                roleDesc:''
            },
            rolesRole:{},
            //添加角色验证
            addRoleRules:{
                roleName:[
                    { required:true,message:'请输入角色名称',trigger:'blur' }
                ],
                roleDesc:[
                    //{ required:true,message:'请输入角色描述',trigger:'blur' },
                ]
            },
            //编辑角色验证
            rolesRoleRules:{
                roleName:[
                    { required:true,message:'请输入角色名称',trigger:'blur' }
                ],
                roleDesc:[
                    //{ required:true,message:'请输入角色描述',trigger:'blur' },
                ]
            }
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        //获取角色列表
        async getRolesList(){
            const {data:res}=await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
            }
            this.rolesList = res.data
        },
        //添加角色
        adduser(){
            this.$refs.addRoleFormRef.validate(async valid=>{
                if(!valid) return;
                const {data:res}= await this.$http.post("roles",this.addRole);
                if(res.meta.status!==201) return this.$message.error("添加角色失败");
                 this.getRolesList();
                 this.AddRoleDialogVisible=false;
                 this.$message.success('添加角色成功！')
            });
        },
        //关闭角色框
        AddRoleDialogclose(){
            this.$refs.addRoleFormRef.resetFields();
            this.AddRoleDialogVisible=false;
        },
        //编辑
        async showEditDialog(id){
            const {data:res}= await this.$http.get('roles/'+id);
            if(res.meta.status!==200) return this.$message.error("查找角色失败");
            this.rolesRole=res.data;
            this.rolesRoleDialogVisible=true;
        },
        //关闭编辑角色框
        rolesRoleDialogclose(){
            this.$refs.rolesRoleFormRef.resetFields();
            this.rolesRoleDialogVisible=false;
        },
        //更新角色信息
        rolesuser(){
            this.$refs.rolesRoleFormRef.validate(async valid=>{
                if(!valid) return;
                const {data:res}= await this.$http.put('roles/'+this.rolesRole.roleId,
                    {
                        roleName: this.rolesRole.roleName,
                        roleDesc: this.rolesRole.roleDesc
                    }
                );
                if(res.meta.status!==200) return this.$message.error("更新角色信息失败");
                 this.getRolesList();
                 this.AddRoleDialogVisible=false;
                 this.$message.success('更新角色信息成功！')
            })
        },

        //删除
        async removeRoleById(id){
            const confirmResult = await this.$confirm(
                '此操作将永久删除该角色, 是否继续?',
                '提示',
                {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err => err)
            // 点击确定 返回值为：confirm
            // 点击取消 返回值为： cancel
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }

           const {data:res}= await this.$http.delete(
                'roles/' + id
            );
            if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
            this.$message.success('删除角色成功！')
            this.getRolesList()
        },

        //分配权限
        async showSetRightDialog(role){
            this.roleId = role.id
            // 获取角色的所有权限
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败！')
            }
            //获取权限树
            this.rightsList = res.data
            //   递归获取三级节点的id
            this.getLeafkeys(role, this.defKeys)
            this.setRightDialogVisible = true
        },

        // 通过递归 获取角色下三级权限的 id, 并保存到defKeys数组
        getLeafkeys (node, arr) {
            // 没有children属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafkeys(item, arr))
        },

        //关闭分配权限
        setRightDialogClosed(){
            this.defKeys=[];
            this.setRightDialogVisible=false;
        },

        //确定分配权限
        async allotRights(){
            // 获得当前选中和半选中的Id
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            
            // join() 方法用于把数组中的所有元素放入一个字符串
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if (res.meta.status !== 200) { return this.$message.error('分配权限失败！') }
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible = false
        },

        //删除权限
        async removeRightById(role, rightId){
            // 弹框提示 删除
            const confirmResult = await this.$confirm(
                '此操作将永久删除该权限, 是否继续?',
                '提示',
                {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }
            ).catch(err => err)
            // 点击确定 返回值为：confirm
            // 点击取消 返回值为： cancel
            if (confirmResult !== 'confirm') {
                this.$message.info('已取消权限删除')
                return;
            }
            const { data: res } = await this.$http.delete(
                `roles/${role.id}/rights/${rightId}`
            )
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败！')
            }
            role.children = res.data
        }
    },
}
</script>

<style lang="less" scope>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>